Cyber Acoustics's On-Ear Headphones (ACM-7002) is just what any school needs. Each ear cup has a volume knob for individual level changing, which works great for numerous educational applications. While the headphone's drivers are of impeccable quality, their sound maxes out at a safer level that is suitable for children's ears. The ACM-7002 works with mp3 players, the iPhone, any iPod, and most computers.